Derivative Spectrophotometric method for Simultaneous Determination the residue of Carboxin, Chlorothalonil and Pyriproxyfen in cabbage samples using Zero-crossing Technique

Abstract

We developed and validated a spectrophotometric technique for determining Carboxin, Chlorothalonil and Pyriproxyfen residues in cabbage samples that is simple, accurate, sensitive and precise. The approach is based on recording the first derivative curves and utilising the zero-crossing method to compute the estimated values of each component. There are no earlier separation procedures in this procedure. This investigation led to the revelation that the correlation coefficient of the calibration curves was more than 0.9998. The calibration curves for this spectrophotometric approach for Carboxin, Chlorothalonil and Pyriproxyfen are linear in concentration ranges of (1-35) μg/mL, 0.5-7 μg/mL and (1-30) μg/mL, with a relative standard deviation of no more than 5.0%. The proposed approach has been utilised effectively to test Carboxin, Chlorothalonil and Pyriproxyfen residues in cabbage samples concurrently with a high rate of recovery, accuracy and precision.